Morphing between views of data

ABSTRACT

A method, apparatus, system, and signal-bearing medium are provided that in various embodiments relate to manipulating data. In an embodiment, the data may be manipulated with respect to viewing the data.

LIMITED COPYRIGHT WAIVER

A portion of the disclosure of this patent document contains material towhich the claim of copyright protection is made. The copyright owner hasno objection to the facsimile reproduction by any person of the patentdocument or the patent disclosure, as it appears in the U.S. Patent andTrademark Office file or records, but reserves all other rightswhatsoever.

FIELD

This invention relates generally to graphical user interfaces for aninteractive device.

BACKGROUND

Years ago, filmmakers shot vast quantities of film footage and thenedited it into final form by physical cutting and splicing clips(sequences of frames) together in a labor-intensive, time-consuming, andexpensive process. Today, however, computers have dramatically changedthe process of film editing because nonlinear editing (NLE) applicationsrepresent the clips in digital form and allow the clips to be virtuallycut and spliced together. These applications are called nonlinearbecause no physical tape or film is involved in the editing process, sothe user may jump immediately to the desired clip without physicallyrewinding or fast-forwarding tape or film.

Nonlinear editing applications often represent clips via a clip view, atimeline view, or both a clip view and a timeline view. The clip viewrepresents each clip with a an icon called a slide, which contains thefirst frame of the clip, and all the slides have the same size. The clipview is generally used to re-arrange the order of the clips, to deleteclips, and to insert clips. In contrast, the timeline view representseach clip with an icon called a band, which contains the first frame ofeach respective clip, and the bands have sizes proportional to the timeof the clip when played. The timeline view is generally used to lay downaudio, to synchronize the audio with the video, and to work with theclips based on their length.

A problem occurs when switching between the clip view and the timelineview in that the switch is visually jarring and disorienting, and theusers lose their place within the clips. Although this problem has beendescribed in the context of a clip view and a timeline view, the problemalso occurs when switching between views of any type of data.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 depicts a pictorial representation of an example user interfaceillustrating a clip view, according to an embodiment of the invention.

FIG. 2 depicts a pictorial representation of an example user interfaceillustrating a timeline view, according to an embodiment of theinvention.

FIG. 3 depicts a block diagram of a morphing process, according to anembodiment of the invention.

FIG. 4 depicts a flowchart of example processing, according to anembodiment of the invention.

FIG. 5 depicts a pictorial representation of a track presented by adynamic animation system, according to an embodiment of the invention.

FIG. 6 depicts a pictorial representation of an insertion operationperformed by a dynamic animation system, according to an embodiment ofthe invention.

FIG. 7 depicts a pictorial representation of persistent thumbnailvisibility, according to an embodiment of the invention.

FIG. 8 depicts a flowchart of processing for displaying views, accordingto an embodiment of the invention.

FIG. 9 depicts a block diagram of an example system for implementing anembodiment of the invention.

DETAILED DESCRIPTION

In the following detailed description of exemplary embodiments of theinvention, reference is made to the accompanying drawings (where likenumbers represent like elements), which form a part hereof, and in whichis shown by way of illustration specific exemplary embodiments in whichthe invention may be practiced. These embodiments are described insufficient detail to enable those skilled in the art to practice theinvention, but other embodiments may be utilized and logical,mechanical, electrical, and other changes may be made without departingfrom the scope of the present invention. Different instances of the word“embodiment” as used within this specification do not necessarily referto the same embodiment, but they may. The following detailed descriptionis, therefore, not to be taken in a limiting sense, and the scope of thepresent invention is defined only by the appended claims.

In the following description, numerous specific details are set forth toprovide a thorough understanding of the invention. However, it isunderstood that the invention may be practiced without these specificdetails. In other instances, well-known circuits, structures, andtechniques have not been shown in detail in order not to obscure theinvention.

A method, apparatus, system, and signal-bearing medium are provided thatin an embodiment morph between two graphical views of related contentthat share a common frame of reference. In an embodiment, the two viewsdepict the same data at different resolutions. The morphing permits theviewer to visualize the relationship between the two views along acommon axis or within a common frame of reference.

In another embodiment, a method, apparatus, system, and signal-bearingmedium are provided that morph between a clip view and a timeline view.In the clip view, icons representing clips are the same size. In thetimeline view, icons representing clips have a size proportional to thetime of the clip when played. A virtual playhead icon may be maintainedin the same relative position in both views, so that a user's focus ismaintained.

FIG. 1 depicts a pictorial representation of an example user interfaceillustrating a clip view, according to an embodiment of the invention. Awindow 100 includes a monitor 102, a track 104, a scrollbar 106, buttons108, 110, and 112, and a playhead icon 114.

The monitor 102 is a subwindow in which a selected clip or all clips maybe played as further described below. A clip is a sequence of digitizedframes, which may be displayed in succession to form video and/or audio.Digitized frames are analogous to physical frames that exist onconventional film or tape.

The track 104 contains slides 116, 118, 120, 122, and 124, which areicons that represent respective clips. All of the slides 116, 118, 120,122, and 124 have the same size 126. Although the example of FIG. 1illustrates five slides 116, 118, 120, 122, and 124, in otherembodiments any number of slides may be present. The slides 116, 118,120, 122, and 124 contain respective clip-icons 117, 119, 121, 123, and125, which are icons that in an embodiment display the first frame oftheir respective clips. In another embodiment, some or all of theclip-icons may display any frame or a series of frames. In still anotherembodiment, any identifying information may be displayed within theclip-icons 117, 119, 121, 123, and 125.

The scrollbar 106 allows the user to request scrolling of the track 104and also provides an indication of the location of the current viewwithin the track 104. In the example shown, the scrollbar 106 is at alocation approximately in the middle of the track 104, so an equalnumber of slides not in view (not currently visible) exist on both sidesof the slides 116, 118, 120, 122, and 124. Although FIG. 1 illustrates ascrollbar, in other embodiments buttons or any other user interfaceelement that provides access to a scrolling function may be used.

Since the window 100 shows the clip view, the clip-view button 108 iscurrently selected. When the user selects the timeline-view button 110,the contents of the clip view in the user interface 100 are morphed intothe timeline view shown in FIG. 2 as further described below withreference to FIGS. 3 and 4.

The playhead icon 114 marks a location in one of the icons (in thisexample, the playhead icon 114 is shown marking a location within theslide 118) that represents a position of a virtual playhead within acorresponding one of the clips (in this example clip B). The playhead isdescribed as “virtual” because there is no physical playhead sincephysical tape or film is not used in the editing process. When a playbutton 112 is selected, the corresponding clip (in this example clip B)begins playing in the monitor 102 at the virtual playhead position. Inthe example shown, the playhead icon 114 is displayed at a location thatis approximately 20% of the way (when viewed from left to right) intothe slide 118, so when the play button 112 is selected, the clip Bbegins playing in the monitor 102 approximately 20% of the way throughthe clip, which is the virtual playhead position in this example.

FIG. 2 depicts a pictorial representation of an example user interfaceillustrating a timeline view, according to an embodiment of theinvention. A window 200 includes the monitor 102, a track 204, thescrollbar 106, the buttons 108, 110, and 112, and the playhead icon 114.

The track 204 contains bands 216, 218, 220, 222, and 224, which areicons that represent respective clips. The bands 216, 218, 220, 222, and224 contain respective clip-icons 217, 219, 221, 223, and 225, which areicons that in an embodiment display the first frame of their respectiveclips. The bands 216, 218, 220, 222, and 224 have sizes that areproportional to the playing time of their respective clips. For example,clip B has the longest playing time, so the band 218 associated withclip B has the largest size 250. Likewise, clip C has the shortestplaying time, so band 220 associated with clip C has the shortest size252. The band 216 is a morphed version of the slide 116; the band 218 isa morphed version of the slide 118; the band 220 is a morphed version ofthe slide 120; the band 222 is a morphed version of the slide 122; andthe band 224 of a morphed version of the slide 124.

Since the window 200 shows the timeline view, the timeline view button110 is selected. When the user selects the clip-view button 108, thecontents of the timeline view in the user interface 200 are morphed intothe clip view shown in FIG. 1, as further described below with referenceto FIGS. 3 and 4.

The playhead icon 114 is maintained during the morphing at the samerelative location as it was in the clip view of FIG. 1. Thus, in theexample shown in FIG. 2, the playhead icon 114 is still approximately20% of the way (when viewed from left to right) into the band 218 eventhough the band 218 is larger than the corresponding slide 118.

FIG. 3 depicts a block diagram of a morphing process, according to anembodiment of the invention. Morphing is a term adopted from“metamorphosis” that refers to a process for incrementally transforminga first image into a second image over time using a sequence ofintermediate images, so that the transformation appears to be relativelysmooth and continuous. The morphing process morphs from the clip view ofthe track 104 to the timeline view of track 204 when the user selectsthe button 110 (FIG. 1) or from the timeline view of track 204 to theclip view of the track 104 when the user selects the button 108 (FIG.2).

Morphing occurs between the slide 116 and the band 216, between theslide 118 and the band 218, between the slide 120 and the band 220,between the slide 122 and the band 222, and between the slide 124 andthe band 224 as illustrated in FIG. 3. During the morphing process, theplayhead icon 114 is maintained in the same relative position within itsslide or band, which allows users to maintain focus. In the exampleshown in FIG. 3, the playhead icon 114 is approximately 20% of the waythrough the slide 118 and 20% of the way through the band 218 and ismaintained at approximately 20% during the morphing process even thoughthe band 218 has a larger size than the slide 118. Although in theexample shown all of the icons remain visible during the morphingprocess, in other embodiments as the icons expand and/or contract someof the icons may be pushed out of view, so they may be accessed via thescrollbar 106 (FIGS. 1 and 2).

FIG. 4 depicts a flowchart of an example morphing process, according toan embodiment of the invention. Control begins at block 400. Controlthen continues to block 405 where a toggle command between the clip viewand the timeline view is received. In an embodiment, the user may togglebetween the clip view and the timeline view by selecting either the clipview button 108 or the timeline view button 110, as previously describedabove with respect to FIGS. 1 and 2. Control then continues to block 410where a determination is made whether a clip is selected. In variousembodiments, a clip may be selected by selecting its associatedclip-icon, slide, or band using an input device. But in otherembodiments, any appropriate technique by be used for selecting a clip.

If the determination at block 410 is true, then control continues toblock 415 where a determination is made whether the selected clip is inview, i.e., visible in the track 104 or 204, as previously describedabove with reference to FIGS. 1 and 2. If the determination at block 415is true, then control continues to block 420 where a morphing operationis performed around the center point of the icon associated with theselected clip keeping the center point in view if possible. In anembodiment, the morphing process is a sequence of moving or transposinga point or points or a rectangle of four points over a period of time.The morphing process morphs between the clip view and the timeline view(in either direction depending on which command was received at block405), as previously described above with reference to the examples ofFIGS. 1, 2, and 3. In an embodiment, the morphing may be performed by adynamic animation system, as further described below with reference toFIGS. 5, 6, 7, and 8.

Control then continues to block 440 where a determination is madewhether the morphing was done in the clip view to timeline viewdirection and any icons were pushed out of view from the track 204. Ifthe determination at block 440 is true, then control continues to block445 where the position of the scrollbar 106 is updated to reflect thenew position of the icons within the track 204. In another embodiment,the processing of blocks 440 and 445 is performed before the sequence oftransposing begins. In another embodiment, the processing of blocks 440and 445 is performed before each step in the transposing sequence. Inyet another embodiment, the processing of blocks 440 and 445 isperformed after each step in the transposing sequence. Control thencontinues to block 499 where the function returns.

If the determination at block 440 is false, then control continuesdirectly to block 499.

If the determination at bock 415 is false, then control continues toblock 425 where a determination is made whether the playhead icon 114 isin view. In another embodiment, the determination of block 425 may beperformed prior to the determination of block 410. If the determinationat block 425 is false then control continues to block 430 where amorphing operation is performed around the center point of the track(e.g., track 104 or 204 of FIG. 1 or 2) keeping the center point fixedif possible. The morphing operation morphs between the clip view and thetimeline view (in either direction depending on which command wasreceived at block 405), as previously described above with reference tothe examples of FIGS. 1, 2, and 3. In an embodiment, the morphing may beperformed by a dynamic animation system, as further described below withreference to FIGS. 5, 6, 7, and 8. Control then continues to block 440as previously described above.

If the determination at block 425 is true, then control continues toblock 435 where a morphing operation is performed around the playheadicon 114 (FIG. 1 or 2) keeping the playhead icon 114 within view. Themorphing operation morphs between the clip view and the timeline view(in either direction depending on which command was received at block405), as previously described above with reference to the examples ofFIGS. 1, 2, and 3. When morphing from the timeline to the clip view, ifthe expansion of the clips would cause the sequence of clips to leave avoid at the beginning of the track 104, then in an embodiment, all theclips are packed to the left edge of the track 104 to obviate this void.In an embodiment, the morphing may be performed by a dynamic animationsystem, as further described below with reference to FIGS. 5, 6, 7, and8. Control then continues to block 440 as previously described above.

If the determination at block 410 is false, then control continues toblock 425, as previously described above.

FIG. 5 depicts a pictorial representation of a track 500 presented by adynamic animation system. The timeline and the clip shelf are based on adynamic animation system that handles the task of tracking andcontrolling the position of visual elements in a view. Theimplementation of the system is a view comprised of any number oftracks, each of which contains any number of visual elements, referredto as cells, such as cells 505, 510, 515, 520, 525, and 530. The trackorders the cells into groups with a consistent distribution pattern.Tracks can be modified programmatically, but cells are controlledcompletely by their tracks. The responsibilities of the track include:positioning cells, adapting animation paths to fit the distributionpattern, and facilitating event handling.

The cell distribution pattern is programmed into the track 500. Wheneverthe data model or drawing context changes, the track executes a reflowoperation, which determines the ideal position of each cell relative tothe track's boundary. If the ideal position for a cell does not matchits present target position, its animation path is redefined. The trackthen repeatedly computes the instantaneous position of each cell on itsanimation path and updates the modified regions of the view. Thus, forexample, cell 515 has initial position 552, current position 554, andfinal position 556. Once all cells have reached their target positions,the animation cycle shuts down.

FIG. 6 depicts a pictorial representation 600 of an insertion operationperformed by a dynamic animation system, according to an embodiment ofthe invention. The basic track object is capable, without modification,of animated drag-and-drop insertion, with the requirement that thedistribution pattern preserves order and contiguity. The built-inalgorithm is capable of working with any formation, including non-linearorders such as spirals, waves, and rotated matrices.

In an embodiment, a user selects an insertion point 601 for an object.In various embodiments, the object may be a cell, an image, a style, anicon, or any other object. In an embodiment, the user may select theinsertion point 601 via a mouse pointer, but in other embodiments anytype of input device may be used to select the insertion point. Then,the algorithm finds the cell closest to the insertion point 601 on thecoordinate plane transformed to favor the local direction of thedistribution pattern. Next, the algorithm determines the average of theangles orthogonal to the segments joining the center of the nearest cellwith both its precursor cell 603 and successor cell 604, calculates theline through the nearest cell using the aforementioned angle, anddetermines whether the point of insertion is greater than or less thanthe inequality based on that line. If the point of insertion is greaterthan the inequality based on that line, the image is inserted after thecell closest to the insertion point. If the point of inserter is lessthan the inequality based on that line, the image is inserted before thecell closest to the insertion point. The simplest case is a linear,contiguous distribution pattern, as used in the timeline and clipviewer.

The abstraction of individual cell behavior into more general tracksmakes complicated transformations such as transitioning between thetimeline and clip viewer relatively simple to implement.

FIG. 7 depicts a pictorial representation of persistent thumbnailvisibility, according to an embodiment of the invention. As a means torecognize a clip 700 seen in the timeline, a thumbnail 702 is visible toidentify the clip uniquely from other clips, and the thumbnail 702 iskept onscreen at all times to preserve this means of identification.When a clip extends past the visible region (bounded by left edge 704and right edge 708) of the timeline, an embodiment of the inventionprovides an indication of how far past the visible region (bounded byleft edge 704 and right edge 708) the clip extends, and conversely, whatpart of the clip 700 the user is viewing.

The positioning algorithm approaches the center of the clip 706 as itnears complete disclosure and keeps the clip onscreen at all times. Theposition of the clip is directly related to the relative position of thevisible portion (bounded by left edge 704 and right edge 708) of theclip to the entire region of the clip 700. In the example of FIG. 7, theclip 700 extends past the right edge 708 of the visible portion, so thethumbnail 702 is moved off-center (from the center 706 of the visibleregion) toward the right. But, in another embodiment where the clipextends past the left edge 704 the thumbnail is moved off-center (fromthe center of the visible region) to the left. The further the clipextends relative to the visible region, the closer to the edge thethumbnail becomes. As the user scrolls rightward, the thumbnail movesleftward to indicate this relative movement. Likewise, as the userscrolls leftward, the thumbnail moves rightward to indicate thisrelative movement. Because the algorithms behave symmetrically betweentracks, it is also easy to tell the global relative position of adjacentclips based on the local relative position of the thumbnails.

FIG. 8 depicts a flowchart of processing for displaying views, accordingto an embodiment of the invention. Control begins at block 800. Controlthen continues to block 805 where a first view of data content isdisplayed and the displayed data content has a frame of reference and apoint of focus (or area of interest). In an embodiment, the data may bea document, a map, an image, a video, or any other data content capableof being displayed. In an embodiment the frame of reference may be alinear axis along which the first view is displayed. In an embodimentthe frame of reference may be a time sequence axis along which the firstview is displayed. In another embodiment, the frame of reference may bea two-dimensional space.

Control then continues to block 810 where a command is received toswitch from the first view to a second view. In an embodiment, thecommand may be a user selection of an area of interest (or point offocus) within the first view.

Control then continues to block 815 where, in response to the command,the first view is morphed into the second view of the data content. Inan embodiment, the second view is in the same frame of reference as thefirst view. In an embodiment, the first and second views are arrangedalong linear axis that is the frame of reference.

In an embodiment, the point of focus of the first view is maintained inthe second view. In an embodiment the user may define the point of focussuch as via an input device. For example, when the input device is apointing device, such as a mouse, the user may gesture with the pointingdevice to move a pointer on an output device to define the point offocus.

In an embodiment, the first and second views have different resolutions,with one view having a higher resolution and the other view having alower resolution, and the morphing operation causes a zoom in or outbetween the resolutions. In an embodiment, a view with a higherresolution shows more detail than a view with a lower resolution.Control then continues to block 820 where the function returns.

Although only two views with one morphing operation between them areillustrated in FIG. 8, in other embodiments any number of morphingoperations with any number of views may be performed. For example, azoom operation may be performed from a first view having a firstresolution to a second view having a second higher (or lower) than thefirst resolution to a third view having a third resolution lower (orhigher) than the second resolution.

FIG. 9 depicts a block diagram of an example system for implementing anembodiment of the invention. A system 900 includes a computer 910connected to a server 990 via a network 991. Although one computer 910,one server 990, and one network 991 are shown, in other embodiments anynumber or combination of them are present. In another embodiment, theserver 990 and the network 991 are not present. For the avoidance ofdoubt, any interactive system with a graphical user interface couldadvantageously use the present invention. For example, a handheldcomputer, handheld our mounted graphical map device, television withinteractivity, cell phone, or similar system could employ the invention.

The computer 910 includes a processor 930, a storage device 935, anoutput device 937, and an input device 938, all connected via a bus 980.

The processor 930 represents a central processing unit of any type ofarchitecture, such as a CISC (Complex Instruction Set Computing), RISC(Reduced Instruction Set Computing), VLIW (Very Long Instruction Word),or a hybrid architecture, although any appropriate processing device maybe used. The processor 930 executes instructions and includes thatportion of the computer 910 that controls the operation of the entirecomputer. Although not depicted in FIG. 9, the processor 930 typicallyincludes a control unit that organizes data and program storage inmemory and transfers data and other information between the variousparts of the computer 910. The processor 930 receives input data fromthe input device 938 and the network 991, reads and stores code and datain the storage device 935, and presents data to the output device 937.

Although the computer 910 is shown to contain only a single processor930 and a single bus 980, the present invention applies equally tocomputers that may have multiple processors and to computers that mayhave multiple buses with some or all performing different functions indifferent ways.

The storage device 935 represents one or more mechanisms for storingdata. For example, the storage device 935 may include read only memory(ROM), random access memory (RAM), magnetic disk storage media, opticalstorage media, flash memory devices, and/or other machine-readablemedia. In other embodiments, any appropriate type of storage device maybe used. Although only one storage device 935 is shown, multiple storagedevices and multiple types of storage devices may be present. Further,although the computer 910 is drawn to contain the storage device 935, itmay be distributed across other computers, for example on server 990.

The storage device 935 includes a controller 920 and clips 925. Thecontroller 920 includes instructions capable of being executed on theprocessor 930 to carry out the functions of the present invention, aspreviously described above with reference to FIGS. 1-8. In anotherembodiment, some or all of the functions of the present invention arecarried out via hardware in lieu of a processor-based system. In anembodiment, the controller 920 is a video-editing application, but inother embodiments, the controller 920 may include any function capableof manipulating clips. Of course, the storage device 935 may alsocontain additional software and data (not shown), which is not necessaryto understanding the invention.

The clips 925 include a digital representation of audio and/or visualmedia. In an embodiment, the clips 925 include digital representationsof video frames. In another embodiment, the clips 925 include digitalrepresentations of video frames and associated audio tracks. In yetanother embodiment, the clips 925 include digital representations ofaudio tracks. In various other embodiments, the clips 925 may include adocument, a map, or any other data capable of being displayed orotherwise presented to a user.

Although the controller 920 and the clips 925 are shown to be within thestorage device 935 in the computer 910, some or all of them may bedistributed across other systems, for example on the server 990 andaccessed via the network 991.

The output device 937 is that part of the computer 910 that displaysoutput to the user. The output device 937 may be a cathode-ray tube(CRT) based video display well known in the art of computer hardware.But, in other embodiments the output device 937 may be replaced with aliquid crystal display (LCD) based or gas, plasma-based, flat-paneldisplay. In still other embodiments, any appropriate display device maybe used. Although only one output device 937 is shown, in otherembodiments, any number of output devices of different types or of thesame type may be present. The output device 937 displays the windows 100and 200 previously described above with reference to FIGS. 1 and 2,respectively, or the images 500, 600, and 700 previously described abovewith reference to FIGS. 5, 6, and 7, respectively.

The input device 938 may be a keyboard, mouse or other pointing device,trackball, touchpad, touchscreen, keypad, microphone, voice recognitiondevice, or any other appropriate mechanism for the user to input data tothe computer 910 and manipulate the user interfaces previously describedabove with respect to FIGS. 1 and 2. Although only one input device 938is shown, in another embodiment any number and type of input devices maybe present.

The bus 980 may represent one or more busses, e.g., PCI, ISA (IndustryStandard Architecture), X-Bus, EISA (Extended Industry StandardArchitecture), or any other appropriate bus and/or bridge (also called abus controller).

The computer 910 is an electronic device that may be implemented usingany suitable hardware and/or software, such as a personal computer.Portable computers, laptop or notebook computers, PDAs (Personal DigitalAssistants), televisions, pocket computers, handheld or mountedgraphical map devices, video editing systems, appliances, telephones,and mainframe computers are examples of other electronic devices thatare possible configurations of the computer 910. The hardware andsoftware depicted in FIG. 9 may vary for specific applications and mayinclude more or fewer elements than those depicted. For example, otherperipheral devices such as audio adapters, or chip programming devices,such as EPROM (Erasable Programmable Read-Only Memory) programmingdevices may be used in addition to or in place of the hardware alreadydepicted.

The network 991 may be any suitable network and may support anyappropriate protocol suitable for communication to the computer 910.

As was described in detail above, aspects of an embodiment pertain tospecific apparatus and method elements implementable on a computer orother electronic device. In another embodiment, the invention may beimplemented as a program product for use with an electronic device. Theprograms defining the functions of this embodiment may be delivered toan electronic device via a variety of signal-bearing media, whichinclude, but are not limited to:

(1) information permanently stored on a non-rewriteable storage medium,e.g., a read-only memory device attached to or within an electronicdevice, such as a CD-ROM readable by a CD-ROM drive;

(2) alterable information stored on a rewriteable storage medium, e.g.,a hard disk drive or diskette; or

(3) information conveyed to an electronic device by a communicationsmedium, such as through a computer or a telephone network, includingwireless communications.

Such signal-bearing media, when carrying machine-readable instructionsthat direct the functions of the present invention, representembodiments of the present invention.

1. A method comprising: displaying a portion of a clip in a visibleregion onscreen, the portion displayed in the visible region being lessthan the clip in its entirety such that the portion includes all of theclip that is visible, the clip uniquely identified from other clips by athumbnail, the thumbnail being unique and different from the clip; anddisplaying the thumbnail at a visible location onscreen in a regionhaving a center between two boundaries, displaying the thumbnailincluding automatically positioning the thumbnail at the visiblelocation to indicate a position of the clip such that the indicatedposition of the clip is directly related to the position of the portionof the clip in the visible region relative to the entirety of the clip;and moving the thumbnail relative to the center to indicate an extent towhich the clip extends past the visible region as the display of theclip onscreen changes.
 2. The method of claim 1, wherein the methodincludes maintaining visibility of the thumbnail to indicate a globalposition of the clip relative to one or more other clips adjacent to theclip.
 3. The method of claim 2, wherein displaying a thumbnail includeskeeping the thumbnail onscreen at times while the clip is displayed. 4.The method of claim 1, wherein the displaying the thumbnail furthercomprises: when the clip extends past a right edge of the visibleregion, displaying the thumbnail right of a center of the visibleregion.
 5. The method of claim 1, wherein the displaying the thumbnailfurther comprises: when the clip extends past a left edge of the visibleregion, displaying the thumbnail left of a center of the visible region.6. The method of claim 1, wherein the displaying the thumbnail furthercomprises: moving the thumbnail leftward when the clip is scrolledrightward.
 7. The method of claim 1, wherein the displaying thethumbnail further comprises: moving the thumbnail rightward when theclip is scrolled leftward.
 8. The method of claim 1, wherein displayinga portion of a clip includes displaying the portion of the entire clipin a timeline.
 9. The method of claim 1, wherein the method includesdisplaying one or more additional clips in a visible region anddisplaying a thumbnail with each additional clip such that eachthumbnail indicates a relative position of its corresponding clip in thevisible region, each thumbnail providing a unique identification of itscorresponding clip.
 10. An apparatus having a processor and a storagedevice comprising: means for displaying a portion of a clip in a visibleregion onscreen, the portion displayed in the visible region being lessthan the clip in its entirety such that the portion includes all of theclip that is visible, the clip uniquely identified from other clips by athumbnail, the thumbnail being unique and different from the clip; andmeans for displaying the thumbnail at a visible location onscreen in aregion having a center between two boundaries, displaying the thumbnailincluding automatically positioning the thumbnail at the visiblelocation to indicate a position of the clip such that the indicatedposition of the clip is directly related to the position of the portionof the clip in the visible region relative to the entirety of the clip;and means to move the thumbnail relative to the center to indicate anextent to which the clip extends past the visible region as the displayof the clip onscreen changes.
 11. The apparatus of claim 10, wherein thethumbnail identifies the clip the apparatus includes means to maintainvisibility of the thumbnail to indicate a global position of the cliprelative to one or more other clips adjacent to the clip.
 12. Theapparatus of claim 11, wherein the means for displaying a thumbnailincludes means for keeping the thumbnail onscreen at times while theclip is displayed.
 13. The apparatus of claim 10, wherein the means fordisplaying the thumbnail further comprises: means for displaying thethumbnail right of a center of the visible region when the clip extendspast a right edge of the visible region.
 14. The apparatus of claim 10,wherein the means for displaying the thumbnail further comprises: meansfor displaying the thumbnail left of a center of the visible region whenthe clip extends past a left edge of the visible region.
 15. Theapparatus of claim 10, wherein the means for displaying the thumbnailfurther comprises: means for moving the thumbnail leftward when the clipis scrolled rightward.
 16. The apparatus of claim 10, wherein the meansfor displaying the thumbnail further comprises: means for moving thethumbnail rightward when the clip is scrolled leftward.
 17. Theapparatus of claim 10, wherein means for displaying a portion of a clipincludes means for displaying the portion of the entire clip in atimeline.
 18. The apparatus of claim 10, wherein the apparatus includesa means for displaying one or more additional clips in a visible regionand a means for displaying a thumbnail with each additional clip suchthat each thumbnail indicates a relative position of its correspondingclip in the visible region, each thumbnail providing a uniqueidentification of its corresponding clip.